I've seen lots of programs written in lower-level languages that are incomprehensible because the patterns were macro-expanded by hand 1000 times and it's impos

I've seen lots of programs written in lower-level languages that are incomprehensible because the patterns were macro-expanded by hand 1000 times and it's impossible to get the big picture. I can't say I've ever seen a Lisp program where abstraction made it incomprehensible. That seems to be a common meme, though. I'd love to see an example.